Dry-pan grinding apparatus



Nov. 8, 192 7.

W. L. HANLEY, JR

DRY PN GRINDING APPARATUS Filed Oct. 14. 1924 4 Sheets-Sheet l y WQTOR ATTQRNBY 4 Sheets-Sheet 2 ATTORNEY Novo 8, 1927.l

W. L. HANLEY, JR

DRY PAN- GRINDING APPARATUS File oet. 14, 1924 [l [lill .Aqylum W llliil H Il Nov. 8, 1927.

W. L. HANLEY, JR'

DRY PAN GRINDING APPARATUS Filed Oct. 14, 1924 4 Sheets-Shea?l 3 Nov. 8, 1927. 1,648,176

W. L.. HANLEY, JR

um PAN GRINDING APPARATUS Filed Oct. 14, 1924 4 sheets-sheet 4 24g /341 243 l Z39 umm-'Ul l.

ATTORNEY Patented Nov. 8, 1927..

unirse stares PATENT erica.

WILLIAM LEE HANLEY, JR., OF BRADFORD, PENNSYLVANIA.

DRY-PAN GRNDING APPARATUS.

Application led October 14, 1924. Serial No. 743,538.

nular rim supported stationarily, slightlyv above the outer marginal portions of the disc or pan `and adjustable vertically With respect thereto, to torni an annular delivery slit or outlet, through Which the ground product may be discharged When it has been reduced to particles ot'sutliciently small size as to pass between the lovver edge of the rim and the upper l'ace of the disc or pan, thus dispensing `with the use of screens inl the disc or pan which were formerly employed. As the disc or pan is rotated, the clay or other material to be ground is carricd 'under the freely revoluble mullers, which `in the larger sizes ot the machines may weigh several tons each, for the purpose oi breaking up the material to be ground into line particles, and the mullers are theretore obliged to rise and tall in passing over the lumps oi' the material acted upon and the retaining arms for the mullers are necessai-ily subjected to severe torsional strains in n1aintaining the mullers at all times in ver.- tical position. As a consequence, these arms 'frequently break and usually at or near their points ot pivoting. lt has also been found to be a very ditlicult matter to secure the proper adjustn'ient between the lower edge ot theannular rim and the upper face ot the disc at all points around the disc andeven when this adjustment has been obtained in a manner at least satisfactory for commercial purposes, it is difficult to positively hold the rim in its adjusted position at all points around the same. It is customary to provide the stationary rim usually at tivo or more points with inwardly extending scraper plates or detlector plates tor the purpose oi' detlecting the material on the disc or pan, which has a tendency to Work toward the periphery by centrifugal torce, baci; `toward the center ot the disc or pan in order to have iti pass under themullers over and over again until reduced to the proper degree ot 'ineness. The positions ot these scrapers vertically 'with respect to the pan is also regulated by the same adjusting devices which supportv the rim in vits yadjusted position, and the jarring contact of the material on the vpan against these Scrapers imparted to lthe rimV and has a tendency' to `disturb the adjusting devices therefor. It the rim is adjusted too high the material Will escape from the apparatuslin a more coarse condition than is desired, and it' the rim approaches the pan too closely the discharge ot the finely ground materialis.

prevented or retarded'or the material is ground more finely than is desired or necessary.` n

One of the objects ot my present invention is to provide supporting means for the mul- 1ers, which Will strengthen the supporting members and enable them to resist the torsional strains to Which ,they are necessarily subjected, While at the same time permitting the 'vertical movement of the mullers in passing over the material to be ground. I accomplish this result by providing a horizontally disposed supporting 'trame for each muller comprising arms located on opposite faces ot' the muller and connected With the muller by means permitting the rotationot the latter, the said trame being pivotally supported at one `end upon a stationarily supported pivotal connection, and the said arms adjacent to the other end of the trame beingrigidly connected together and capable ol vertical movement. In practice I prefer to employ a spring or other yielding support for the non-pivoted end ot' the muller traine. l also prefer to form the annular riin of a plurality ot sections, either two vsections or more, having overlapping end portions to prevent the material trom escaping except through the delivery slit formed between the lower edges of said sections, and the upper surface ot' the disc. Each rim section is rigidly supported at a plurality of points by independently adjustable means Which will notbe aitected by any jarring to which the rim sections may be subjected and Certain ot said rim sections or each ot them is or are provided at one end with a portion extending inwardly toward the axis of the pan and forming a scraper or deflector. This construction permits ot a ready adjustinent ot the entire rim with respect to the llt) upper surface of the pan, as each section is suse atible to independent adjustment various portions thereof, without affecting the adjustment ot the other sections, and as the adjusting means and the sujiporting means et both are incapable ot being affected accidentally by any jarring to which the machine is subjected, the said sections will be retained at all times in the positions to which they are adjusted. On account oit the great weight of the mullers and the severe attri` tion to which the upper surface ot the pan is subjected, l prefer to provide the pan with a renewable grinding surface, which consists ot an annular ring formed in sections, for instance in tour quadrantal sections, and having beveled portions at their outer and inner edges, the outer beveled portions interlocking with undercut portions formed directly on the pan adjacent to the peripheral edge thereoi", and the inner beveled portions being engaged by `blocks or wedges bolted or otherwise secured to the pan, thus holding the quadrantal segments in position, but permitting them to be renewed without renewing the entire', disc or pan. These quadrantal segments are preferably iiade oi extremely hard material to withstand the wear to which they are subjected.

lnv the accompanying drawings l have shown'so inuch of a dry pan grinding appa ratus as is necessary for a clear understanding of my present invention. in these drawings,

Fig. l represents a plan view of the apparatus, partly in section.

Fig. 2 represents a partial vertical section of the apparatus on the line 2 2 oit Fig. l.

Fig. 3 is an enlarged detail view illustrat` ing one of the supports for the adjacent overlapping ends ot' two oi the rim sections.

Fig'.v 4t is a detail sectional view online i-Li of Fig. s. Fig. 5 is a detail section on line 5 5 et Fig. 3.

Fig. 6 is a .sectional view ot one of the intermediate supports for a rim section.

Fig. 7 is a plan view ot the dise or pan showing` the segmental wearing plates.

Fig. 8 is a detail of a modilied forni of adjusting means for the rim sections.

Referring to the drawings. i, represents the horizontally disposed pan or disc mounted upon the vertical shaft, 2, supported at its lower end in a heavy step bearing, 3, which if; mounted on a suitable foundation. ln this instance l have shown teun'L ation walls, 1 -4, or abutment ot concrete connected by transverse girders, 5, upon which the step bearing, 3, rests, the foundation being trusser and strengthened in any usual or desired manner. ln this instance l have shown two inullers, indicated at (SG. each of which is provided with shaft portions or trunnions, indicated at Y, which may be pro- Leisure vided in any desired manner, said shaft portions projectii i' laterally troni the opposite faces oi the muller. Fach n'iuller is provided with a suj'iporting t 1ame 'for maintaining it in vertical position and holding it in proper position with respect to the pan, l. ln this instance each ot said 'frames coinprises a pair oit substantially parallel arms, 8, having portions extendine on opposite faces of the inulier and provided with bearings, indicated at 9, to 'he sha'i't por! tions, '7, ot thc muller so a permit the tree rotation ol the ninller y,th respect to the iframe. rlhe arms, SHS, are connectec at one end and pivotally sur-norted in a sub stantially horizontal po-"ition adjacent to the shatts ot the niuilcrs. ',lhey are shown as connected to a sleeve. indicated at l0, to which they are rig'dly secured and they may be termed integrally with the sleeve, it preferred. Each o? lhe sleeves, l0, is pivotally mounted on a shai't, il, which is stationarily supported iu this instance being held in cla ips, l2, "11i-ee ot' which are shown, secured to angle plates, 13, having vertical flanges embedded in one ot the concrete foundations or abutments, 4t. The opposite end portions ot the arms, 8, which extend past the bearings, 9, and are vertically movable, and rigidlj united together. This may be accomplished in many ways. ln the present instance l have shown the verticallv n'iovable euch,` of the arms, 8, provided with converging portions, indicated at 8a, rigidly secured to a connecting bracket, Sb, riveted, bolted, otherwise secured thereto, but obviously the supper ing trame 'tor the inuller may be cast integrally, with the sleeve arms and connecting bracket portions in one piece, it desired, or they inav he iornied ot separate pieces ot' either cast or v. 'ought metal, and suitably7 united as prete i f.. lt will be seen that by extending the arms, 8, on the opposite side oi the muller sna'lt from the point oi pivotingl el" the traine, and uniting said arnis rigidly, a very supporting frame is j novided which will enable said traine to niore readily resist the torsional strains to which it is subjected and prevent the breaking` ot the arms adjacent to their points ot pivoting. l preier to construct these trames et' wroueiit metal, wrought iron or steel, to further insure against the breaking of the arms, 8, adjacent to their points ot pivoting which is more likely to occur where cast iron or cast :steel is employed. '.llliey however. be Yl'oi'n'ied o'I cast iron or cast steel, il desired, and in either separated pieces bolted together or as a unitary one piece structure, as pre'tcrred. l also preier to provide a yieldiirscav` support tor the vertically ii'iovable end of each oi said muller supporting trames. and in this instance l have shown each oi said train-es provided with a spiral spring, indicated at li.

ill?

Cil

best illustrated in Fig. 2, I prefer to provide the connecting bracket, 8b, on its lower face with a cylindrical socket, indicated at 8C, and to provide a similar socket, 8d, supported on a bed plate, `15, secured to angle plates, 16, having' tlanges embedded in the concrete foundations ot the abutment, 4f, opposite that which supports the pivotedend oi the trame, and to use a vertically disposed spiral spring, 14, the ends ot which are engaged by sockets', 8 and 8d. A very heavy spring is employed and lassists in cushioning and steadying the outer or vertically movable end of the muller 'trame and relieves the entire apparatus to a certain ein tent from objectionable jarring when the machine is in operation.`

The upper face of the pan or disc, 1, is provided with an annularrib, indicated at 17, the inner tace, 18, ot which is undercut. The upper tace ot the disc or pan is also provided with a renewable wearing surface consisting of a plurality oit segmental plates, 19, four quadrantal plates being shown. Each of these plates, 19, is provided with a recess, 19, around its peripheral edgegtitting the annular retainingl rim, 17, of the pan, 1, the outer edges, 19, oit the segments, 19,'however,extending over the retaining rim' so as to provide the disc with a perfectlyl smooth horizontal wearing surface to the extreme edge otl the saine. The inner edges of the segments, 19, are also beveled as indicated' at 20, andare held in place by segmental wedges, 21, surrounding the hub, 1, oit the dise and held in place by suitable bolts, 22. Tlienipper end ot the shaft 2, is supported in any desired manner, in this instance by a bearing, 23, supported between girders, 211, secured to masonry or other supports, indicated at 25. 1t will be understood that the shaft, 2, will be driven in any. suitable manner, and by 'any suitable source of power,` thereby rotating the hori- Zontal pan or disc, 1,'and eiiecting the ro tation of the freely revolving mullers, 6, as usual in dry pan grinding apparatus. In the present instance I have shown the shaft, 2, provided with a driving gear, 26, meshing with a driving pinion, 27, on a sha-tt, 28, which in this instance is shown connected to the armature shaft of an electric motor, 29; The shalt, 2, however, may be driven in any usual or preferred manner.

Surrounding the material on tne dry pan or disc, 1, adjacent to the peripheral porn tions thereof, is a vertically disposed retaining rim, preferably formed oit sections, each ot which sections overlaps portions oit another section, so as to prevent the accidental escape ot material. Each ot these rim sections is supported at a plurality of points, and has an end portion, extending inwardly toward the center ot the pan, to serve as a scraper or del'lector. ln the present instance l have shown this rim composed ot two sections, but it Awill be obvious that three, four or more sections may be employed, it iound advantageous. In the present instance, each ot these rin'rsections, consists or a curved, vertically disposed metal bar, indicated at 30, `formed by bending a flat bar of metal into theproper torni, eachk section being preferably provided at one end with adjust able supporting` means, which is located above and closely adjacent to the periphery of the pan or disc, 1, said rim section ollowing closely the curvature ot' the periphery ot the riinrfor a considerable distance, and then curving inwardly, as indicated at 31, toward the center of the disc or pan, to 'torni a scrapersection, the scraper section of each rim section extending past the opposite end oit the adjacent section so as to make the rim sections overlap for a considerable distance. In order to support the rim sections and provide for their vertical adjustment with respect to the pan or disc, I prefer to provide adjustable supporting means engaging each section at three or more points, as herein shown, three points being my preierred construction. In this instance each rim section, 30, has at one end a supporting hanger, 32, shown enlarged in 3 and 5, having biturcated portions, 323, litting the rim section, 30, 'and secured thereto by rivets or bolts, 34, the said hanger being provided wtih a vertical aperture, indicated at 35, through which a vertically disposed adjusting screw passes for securing the vertical adjustment ot' the rim section at that point. In Figs. 3 and 5, theaperture, 35, is shown as a threaded aperture and engages a vertically disposed adjusting screw, 36, provided at its lower end with a reduced bearing portion, 37, engaging a bearing aperture in a supporting bracket, 38, the upper end o' the screw being provided with arbearing portion, 39, passing through a bearing aperture `in thebracliet, 38, the bearing portion, 39, being of larger diameter than the screw' itselt. The screw, 35, is also provided with a shank portion, 40, of smaller diameter than the bearing portion, 39,terminating at its upper end in a polyg`- onal portion, 41, the screw being held in the bracket by a cap plate, 4Q, tit-ting the shank portion, 40, and secured to the bracket by screws or bolts, as clearly shown in Fig, 5. lt will be seen that by placing a wrench or key over the polygonal head of the screw, 35, and rotating the screw, the hanger, 32, and the adjacent end ot the rim section to which it is connected will be adjusted vertically and with the utmost nicety and that the rim section will be held in any position to which it may be adjusted against accidental displacement. The bolts, 34, connecting the hanger, 32, with the rirn section are horizontal so that they are not lill) lill) affected by jarring', and there can be no change in the position of the rim section eX- cept by manipulation of the adjusting screw, 3G.

in Elie'. 8 l have shown a slightly different forni of adjus ing means, which comprises in this instance a vertically threaded bolt, S5, extending through the bracket, 3S, and held in place by a nut at its lower end, the said bolt passingl through an unthreaded aperture, indicated at 32, in the clip or hangsr 3,9 which is secured to the adjacent end olf the rim section by the horizontal bolts or rivets, 3&1. rlhe bolt, 35e, is provided with adjusting nuts, 35", above and below the hanger, 32a, and by adjusting these nuts, the vertical adjustment of the adjacent end of tire rim can be secured and the parts will be held in adjusted position by setting` up the nuts, 35 in opposite directions so as to lock each other. l do not limit myself to either of the speciliic adj iisting;v means shown, as variations may be made therein within the spirit of my invention.

The bracket, 38, illustrated in Figs. 3 and 5, is conveniently formed as a part of or attached to the central bearing, i2, for the pivot shaft, ll, upon which the muller supporting frames are pivoted., and l prefer to so construct this hracl et, 3S, that it will support the adjusting means for the overlappingl portions of two adjacent sections. rilhis is illustrated in plan in 3 and in Fig. el l have shown a sectional view on the line 1L-fl of Fig. 3, which illustrates the manner in which the bracket, 38, is conveniently formed as a part of the bearing, l2, although obviously it may be supported in other ways. ln Fig. Ll, 3l represents the overlapping portion of the adjacent rim section, which is provided with a hanger, rigidly secured thereto by means of horizontal rivets or bolts, 415, and provided with a boss, e5, having a vertical opening therein to cooperate with the adjustingmeans. As shown in Fig. 4l., the aperture in the boss, at), is threaded and engages a screw, 13G, constructed exactly in accordance with the similar screw illustrated in Fig. 5, and areviously described, the various parts being given the Same reference numbers with 100 added.

l also prefer to provide each rim section with one or more 'intermediate brackets and adjustin` devices so that each rim section will be supported and will be adjustable at Ithree points. in the present instance l have shown each rim section provided with an intermediate hanger, 50, illustrated in detail in Fig. 6, and adjacent thereto l provide a supportingY bracket, indicated at 51, suitably mounted on the frame or foundation of the apparatus, and provided with a vertically disposed adjusting screw for the hanger, 50. The hangers, 50, are each secured to the Lee-aire acont rim section, 30, by horizontally disposed rivets or bolts, 5i, and the bracket therefor is provided with a vertical opening threaded internally to engage the adjusting screw, 236, having bearing portions, 237- 239, adjacent to its ends engaging bearings` in the brackets, 5l, and provided at its upper end with a polygonalportion, .Q4-l, t0. receive a wrench or key for turningl the screw. is illustrated in Fig. 6, l may provide the screw with means for locking it positively against rotation, consisting in this instance of a locking plate, 2&2, having a polygonal aper are therein, to lit the polygonal portion, Qeil, of the screw, said plate being; held in place on the bracket by an attaching screw, 243. lilith this construction it is necessary to detach the plate, 242, before attempting to adjust the screw, 236, and this plate will hold the screw positively against the possibility of accidental displace nient. lt will be understood that l may provide all of thel adjusting screws, 36, 136 and with this locking device or keeper, illustrat-ed in 5, if found necessary or desirable.

t will also be understood that in connection with each of the hangers, 32, 4rd, and 50, secured to the rim sections at diiferent points .c may employ the adjusting device illustrated -n Fig. S instead of the screws, 36, 136 and if desired.

ft will he seen that the rim sections, 30, are cach capable of very ready adjustment, as each section is provided with a screw tlufeaded adjusting` means adjacent to each end and at one or more points between, and that each section is adjusted "so that its lower edge is at a uniform distance from the upper face of the pan or disc, 19. lt. will be seen that the adjustment of one of the rim sections does not affect the other, and the difficulty of securing' the desired adiusti'nent of the rim to provide a uniform horizontal slit between its lower edge and the upper face of the disc is greatly diminished. lli/here the rim is made in one piece it cannotbe adjusted at any one point without loosening the adjusting devices at other points, and the adjustment of the integral rim at one point will affect the adjustment of almost the entire rim so that it is a very difficult matter to accurately adjust the rim when made in a unitary structure. lt will also be seen that by providing each of the rim sections with the overlappingportions extending' beyond the end of the adjacent section, no material can escape between sections. and moreover the scraper portions, 3l, can be very conveniently formed integrally with the rim sections, and this enables them to be adjusted therewith, and also prevents the possibility of the Scrapers, 3l, becoming at any time detached from the rim section. rEhe specific construction of the screw threaded adjusting devices illustrated in Figs. 3, 4, 5 and 6, is not herein claimed, as the saine forms no part of my present invention, and other forms ot adjusting devices, such as that illustrated in Fig. 8, for example, may be employed in place ot the par ticular parts illustrated in said figures.

lVhat I claim and desire to secure by Letters Patent is:-

l. .ln a dry pan grinding machine, the combination with a horizontal rotatable pan and mullers, of a stationary rim located slightly above said pan and providing a discharge aperture between its lower edge and said pan, said rim being formed of separate sections, having overlapping portions, said sections beingr each provided with outwardly extending brackets rigidly secured thereto, and stationarily supported devices provided with screw ithreaded adjusting means for engaging said brackets, whereby said rim sections can be independently adjusted, and held against accidental movement in any adjusted position.

Q. In a dry pan grinding machine, the

combination with a horizontal rotatable pan and mullers, of a stationary rim located slightl y above said pan and providing a dis'- cl'iarg'e aperture'between its lower edge and said pan, said rim being formed of separate sections, having` overlappingr port-ions, each of said rim sections being provided with a portion between its ends, curved substantially conccntrically with the axis of the pan and `having an integral end portion bent inwardly from said central portion and lying wit-hin the concentric portion of another'section, and servingr as a scraper to deflect the material ou vthe pan away from the periphery thereof, each of said rim sections being provided with outwardly extending brackets rigidly secured to said substantially concentric portions at intervals, stationary sup-` porting means for each of said brackets pr0- vided with vertically adjusting means, for securing; the vertical adjustment of said substantially concentric portions of the rim sections.y and said scraper portions thereof.

ln testimony whereof I aliiv my signature.

VVIL'LAM LEE HANLEY, JR. 

